Supervisor&#39;s assistant.



- PATBNTBD APR.. 7Y, 1903.

S. N. BETTS. SUPERVISORS ASSISTANT.

APPLICATION FILED JULY 18, 1902.

2 Sums-sum 2.

10 MODEL.

THE Noam: PEI'LRS no PHuTO-umoq wAsNmcnw by c UNITED STATES PATENTOFFIcE.

STEPHEN N. BETTS, OF I-IILLSDALE, MICHIGAN.

SUPERVISORS ASSISTANT.

SPECIFICATION forming part of Letters Patent No. 724,424, dated April"z, 1903. A Application filed July 18, 1902: Serial No. 116,127.(NomodeL) To all whom it may concern:

Be it known that I, STEPHEN N. BETTs, of the city of Hillsdale, countyof I-Iillsdale, and State of Michigan, have invented a new and usefuldevice which I call the Supervisors Assistant, of which the following isa specification.

Figure l is a plan view of the adding-machine. Fig. 2 is a view with theface-plate removed. Fig. 3 is an end view, and Fig. 4 is a view of theimplement for operating the adding-machine.

Near the center of the plate D is a large orifice, around which arearranged at uniform distances the figures from 1 to 100, inclusive, andunder this large orifice is located the large wheel E. At the upperlefthand corner of plate D is a small orifice under which is located thesmall wheel F. At the left of the large orifice in plate D is the slotM, and at the left of the small orifice in plate D is the notch L. Onthe outer rim of the large wheel E are arranged at uniform distances thenumbers from 1 to 100, and opposite to each number is a hole. On theouter rim of the large wheel E is a spring H. The small wheel F has cogsor ratchets on its outer rim, and each cog is numbered on the face ofthe wheel. The guard-plate G is metallic and is located under the smallwheel F. It has a notch Pin the edge facing the large wheel E, so thatthe spring II will catch and move forward the small wheel F one cog ateach revolution of the large Wheel E. The spring I is simply a brake toprevent the small wheel F from going forward more than one cog at atime.

' Operation: Always turn the wheels E and F forward and never backward,and never try to move the small wheel F when 0 is in the slot M. To setthe adder for work, first put 24. on the small wheel F in the notch L;second, turn the large wheel E forward until 0 comes into the slot M.NowO is also in the notch L, and the adder is ready for 5 forward untilit is stopped by the stop K.

32 will now be seen in slot M. Now put your awl in the hole opposite thenext number to be added (we will suppose it to be 82 and turn forwarduntil stopped by the stop K, and you will have l in the notch L and 14.in the slot M, which will be one hundred and fourteen. Now put your awlin the hole opposite 95, the next number to be added, and move forwarduntil stopped by K, and you have .2 in the notch L and 9 in slot M,which make two hundred and nine, and so continue until all the columnsare added. The 0 is to be supplied when only one figure appears in slotM and there are figures in the notch L. The figures in slot M are to beput under the columns added, and the figures in notch L are to becarried into the next column to be added. Now set the adder as at firstby having 0 appear at M and L. Add the number to be carried, and thenadd the next columns, and so continue until all the columns are added,setting down the whole amount at the last.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination of the disk or wheel E carrying the spring H with thenotched wheel F and the guard-plate G having the notch thereinsubstantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

STEPHEN N. BETTS.

Witnesses:

SPENSER D. BISHOPP, HENRY M. GIER.

